HydroBASINS lev08 watershed · #7080540820
Bassin de Illinois River
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 5 administrative regions : Cass, Fulton, Mason, McDonough, Schuyler
Sub-basin area
1 161,1km²
Upstream area
46 823,7km²
Discharge
544,53m³/s
Mean elev.
174m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Illinois River1401 km²
- Bassin de Spoon River1310 km²
5 dept-equivalent regions (GADM L2)
- Fulton469.4 km²40.4% of basin
- 378.6 km²32.6% of basin
- 198.1 km²17.0% of basin
- 80.1 km²6.9% of basin
- 36.3 km²3.1% of basin
11 intersecting protected areas
Sanganois State Fish and
IUCN VWildlife Area
28.92 km² overlap
Wildlife Area
9.65 km² overlap
Sand Prairie-Scrub Oak
IUCN VState Natural Area
3.63 km² overlap
Us-Il-84-7
IUCN Not AssignedConservation Easement
1.83 km² overlap
Reserve Program
1.13 km² overlap
Reserve Program
0.89 km² overlap
Foggy Bottom
IUCN VNature Preserve
0.35 km² overlap
Matanzas Prairie
IUCN VState Natural Area
0.34 km² overlap
White Oak Creek Woods
IUCN VConservation Area
0.16 km² overlap
2 more protected areassorted by overlap area
Reserve
0.14 km² overlap
Matanzas Sand Prairie
IUCN VConservation Area
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 382 distinct species · 23 048 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Illinois River : 30 espèces reliées par 74 interactions GloBI sur 3 types (connectance 10.0%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,9°C
Annual rain
953mm
Moisture idx (CMI)
-0,12
Runoff
290mm/an
PET
1 088mm
AET
805mm
Mean slope
0,9°
Water table
73cm
Forest
23%
Crops
51%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)